156677756497 has 2 divisors, whose sum is σ = 156677756498. Its totient is φ = 156677756496.

The previous prime is 156677756437. The next prime is 156677756519. The reversal of 156677756497 is 794657776651.

156677756497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109720600081 + 46957156416 = 331241^2 + 216696^2 .

It is a cyclic number.

It is not a de Polignac number, because 156677756497 - 2¹⁵ = 156677723729 is a prime.

It is a super-2 number, since 2×156677756497² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (156677756407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78338878248 + 78338878249.

It is an arithmetic number, because the mean of its divisors is an integer number (78338878249).

Almost surely, 2^156677756497 is an apocalyptic number.

It is an amenable number.

156677756497 is a deficient number, since it is larger than the sum of its proper divisors (1).

156677756497 is an equidigital number, since it uses as much as digits as its factorization.

156677756497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466754400, while the sum is 70.

The spelling of 156677756497 in words is "one hundred fifty-six billion, six hundred seventy-seven million, seven hundred fifty-six thousand, four hundred ninety-seven".